Crude-oil still.



T. E. MURRAY.

CRUDE OIL STILL.

APPLICATION'HLIED DEC. M1916- Patented July 23, 1918 THOMAS E. MURRAY.OF NEW YORK, N. Y.

CRUDE-OIL STILL.

Specification of Letters Patent.

Patented July 23, 1918.

- Application filed December 14, 1916. Serial No. 136,863.

To all whom it may concern:

Be it known that I. THOMAS E. luUltRAY, a citizen of the United States,residing at New York. in the county of New York and State of New York,have invented a certain new and useful Improvement in Crude-Oil Stills,of which the following is a specification.

The invention relates to crude oil stills, and more particularly to theremoval of nonvolatile residue from said stills.

Heretofore the process of refining crude petroleum has been to convey itby suitable piping to a horizontal cylindrical tank, set in masonrycontaining also a grate, fire-box, flues, etc. The various products ofdistillation are given off in turn as the temperature rises, and thenon-volatile residue is deposited on the bottom of the tank. In order toremove this residue after the distillation is complete, the fire isdrawn, and after thestill and masonry are cooled sufiiciently to permitmen to enter the tank through manholes in its ends, said residue ismanually shoveled out-a proceeding which Wastes the time necessary forthe cooling of the still and renders the labor necessary for the re-'moval of the residue both onerous and disagreeable.

My invention consists in disposing within the still which is provided atone end with a delivery opening suitable for the extraction of the solidresidue or coke, means for continuously comminuting and stirring saidsolid residue or coke, and for moving the mass continuously to saiddelivery opening and in a direction longitudinal to said still.

In the accompanying drawings- Figure 1 is an elevation of my crude oilstill, one end being in section. Fig. 2 is an enlarged cross'section ofthe still, and Fig. 3 is a longitudinal section of the end of saidstill.

Similar letters of reference indicate like parts.

A is a horizontal cylindrical still supported on the masonry walls B.between which are the fire grates C. D is the crude oil supply pipe, andE is the pipe leading from still to condenser.

An eccentrically placed horizontal shaft F is journaled in the heads Gof the still. and is rotated by any suitable means. As here nhown, thereis a pinion H on said shaft,

actuated by a worm I on the shaft of an electric motor J.

On the shaft 1* are radial arms K which are preferably set alternatelyat right angles. On the end of each arm is pivoted a hub L which on oneside of the pivot carries a scraper blade M, set at an angle to theplane of its carrying arm, and on the other side, a lever N which isconnected by a helical spring 0 to :1 lug on the side of said carryingarm K.

In one head G at the bottom of the still is an opening P whichcommunicates with a receptacle Q, provided with a door R on its outerside.

The operation is as follows:

The still being filled with crude oil and fire started on the grates C.the various products of distillation are given off as the temperaturerises. The non-volatile residue meanwhile descends to the bottom of thestill, and there accun'iulates. \Vhen the distillation is finished. thefires are banked and the shaft F is set in rotation. thus causing thescraper blades M to engage the deposit, and remove the same from thestill wall. and the said arms to commimito and stir said deposit. sothat the said blades by reason of their angular inclination, convoy saiddeposit in a direction lengthwise the still and into the receptacle Q.Ry reason of the springs O, the pivoted scraper blades M are renderedyielding. so that the shock of their impact with the deposit is reducedand their breakage prevented. After the deposit or a suilicient quantitythereof has accumulated in the receptacle. the door It is opened andsaid deposit manually removed.

I claim:

1. A horizontal cylindrical oil still having a delivery opening. alongitudinal rotary shaft in said still, radial arms on said shaft. andangularly placed scraping blades on the ends of said arms: whereby uponthe rotation of said shaft solid n'iatcrial on the bottom of said stillengaged by said blades is moved lengthwise the still to said deliveryopening.

2. A horizontal cylindrical oil still, heads therefor, one of said headshaving a delivery opening. a longitudinal rotary shaft eccentricallydisposed in said still and journalcd in said heads. radial arms on saidshaft, hubs pivoted at the ends of said arms,

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GERTRUDE T. PORTER,

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